714 



TIII: 



ficont expansion, which may bo looked upon us 0110 of tlio rieliest 

 apparatus in the animal economy. Covered at its eni< TLT< -nee from tin; infra- 

 orbital foramen by the supermaxillo-labialis muscle, this fasciculus . leseends 

 beneath the supernasalis-labialis and pyramidal muscle of the nose (super - 

 maxillo-nasalis maguus) towards the, nostrils and upper lip, which nn-ive 

 the terminal extremities of its constituent branches in the substance of their 

 muscular and tegumcntary tissues; these branches are slightly divergent and 

 flexuous, and for the most part anastomose with a largo motor trunk furnished 

 by the facial nerve (Figs. 836, 15'). 



C. INFERIOR MAXILLARY NicuvE(Figs. 336, 11; 110, 12). At its exit from 



Fig. 336. 



GENERAL VIEW OF THE SUPERIOR AND INFERIOR MAXILLARY NJ ., 



The eye has been excised, after sawing through and removing the orbital and 

 zygomatic processes. The maxillary sinuses have been exposed by means of a 

 gouge or chisel, the masseter muscle removed, and the inferior maxilla opened to 

 show the nerve in its interosseous course. 



1, Facial nerve ; 2, Origin of the posterior auricular nerve; 3, Filament distribute:! 

 to the stylo-hyoid muscle ; 4, Digastric branch ; 5, Trunk of the anterior auricular 

 nerve; 6, Origin of the cervical filament; 7, Plexus formed by the union of tin? 

 facial and superficial temporal nerve; 7', Branch of that ploxus united to the 

 infra-orbital nerves, 15'; 11, fnferior maxillary nerve; 8, Superficial temporal 

 nerve; 9, Masseteric nerve ; 10, Gustatory nerve ; 12, 12, Dental branches; 1.'.. 

 Mylo-hyoid nerve; 14, Buccnl nerve; 15, Superior maxill'tri/ n* n\- ; Hi, Sphciio- 

 palatine ganglion; 17, Staphylin (or palatine) nerve; 18, Common .,,-,<//</ 

 nrtery ; 19, Trunk of the occipital; 20, Trunk of the internal carotid: _'!. 

 External carotid; 22, Trunk of the posterior auricular artery embraced by a 

 loop of the facial ; 23, Trunk of the superficial temporal ; '24, Internal maxillary 

 artery; 25, Trunk of the deep anterior temporal artery; '_'<>, Orbital branch of 

 the superior dental ; 27, Buccal artery ; 28, Inferior dental artery. 



the cranium, this branch is situated immediately within the temporo- 

 maxillary articulation, and from thence is directed forward and downward, 

 passing at first between the two pterygoid muscles, then between the inner 

 and deep face of the maxilla, arriving at the maxillo-dcntal foramen, through 

 which it passes and runs along the whole course of the canal, escaping at 

 last by the mental foramen to form an expansion of terminal branelu s 





